Plank unit



FIG. 1 is a perspective view of a plank unit showing a first embodiment of our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a perspective view of a plank unit showing a second embodiment of our new design;

FIG. 9 is a front view thereof;

FIG. 10 is a rear view thereof;

FIG. 11 is a left view thereof;

FIG. 12 is a right view thereof;

FIG. 13 is a top view thereof;

FIG. 14 is a bottom view thereof;

FIG. 15 is a perspective view of a plank unit showing a third embodiment of our new design;

FIG. 16 is a front view thereof;

FIG. 17 is a rear view thereof;

FIG. 18 is a left view thereof;

FIG. 19 is a right view thereof;

FIG. 20 is a top view thereof;

FIG. 21 is a bottom view thereof;

FIG. 22 is a perspective view of a plank unit showing a fourth embodiment of our new design;

FIG. 23 is a front view thereof;

FIG. 24 is a rear view thereof;

FIG. 25 is a left view thereof;

FIG. 26 is a right view thereof;

FIG. 27 is a top view thereof; and,

FIG. 28 is a bottom view thereof.

The plank unit is shown with a symbolic break in its length and width. The appearance of any portion of the article between the break lines forms no part of the claimed design. 

CLAIM The ornamental design for a plank unit, as shown and described. 